The brain of a person with Alzheimer's disease shows excessive amounts of

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Alzheimer's disease is characterized by the buildup of two abnormal structures in the brain: neurofibrillary tangles and amyloid plaque. The neurofibrillary tangles are twisted fibers of protein that build up inside brain cells, while the amyloid plaque consists of protein fragments that accumulate outside the cells. Both of these structures contribute to the death of brain cells, leading to the cognitive decline and memory loss associated with Alzheimer's disease.

The Brain of a Person with Alzheimer's Disease Shows Excessive